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Articoli di riviste sul tema "Underground coal gasification"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 luglio 2024

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1

Green, Michael. "Recent developments and current position of underground coal gasification." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 1 (July 23, 2017): 39–46. http://dx.doi.org/10.1177/0957650917718772.

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Abstract (sommario):

Underground coal gasification is a conversion and extraction process, for the production of useful synthetic product gas from an in-situ coal seam, to use in power generation, heat production or as a chemical feedstock. While many variants of the underground coal gasification process have been considered and over 75 trials performed throughout the world, the recent work has tended to focus on the control of the process, its environmental impact on underground and surface conditions and its potential for carbon capture and storage. Academic research has produced a set of mathematical models of

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2

Wei, Minghui, Yilin He, Aihua Deng, and Qiuyang Tao. "Research on Temperature Simulation of Underground Coal Gasification Wellbore." Academic Journal of Science and Technology 8, no. 3 (December 28, 2023): 81–89. http://dx.doi.org/10.54097/7et0jy56.

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This study aims to integrate the theoretical distribution calculation of temperature and pressure during the gasification process through the derivation of heat conduction, thermal radiation and pressure control theory in the underground coal gasification process, and analyze the temperature of the underground coal gasification process through finite element modeling. Field influencing factors and pressure changes over time. It is of great significance to obtain the relevant parameters of the gasification chamber in the underground coal gasification process.

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3

Petrovic, David, Dusko Djukanovic, Dragana Petrovic, and Igor Svrkota. "Contribution to creating a mathematical model of underground coal gasification process." Thermal Science 23, no. 5 Part B (2019): 3275–82. http://dx.doi.org/10.2298/tsci180316155p.

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Underground coal gasification, as an auto thermal process, includes processes of degasification, pyrolysis, and the gasification itself. These processes occur as a result of a high temperature and the management of coal combustion during addition of gasification agent. Air, water vapor mixed with air, air or water vapor enriched with oxygen, or pure oxygen, may be used as gasification agents. Resulting gas that is extracted in this process may vary in chemical composition, so it is necessary to adjust it. That is the reason why it is necessary to develop a mathematical model of the underground

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4

Kačur, Ján, Marek Laciak, Milan Durdán, and Patrik Flegner. "Investigation of Underground Coal Gasification in Laboratory Conditions: A Review of Recent Research." Energies 16, no. 17 (August 28, 2023): 6250. http://dx.doi.org/10.3390/en16176250.

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The underground coal gasification (UCG) technology converts coal into product gas and provides the option of environmentally and economically attractive coal mining. Obtained syngas can be used for heating, electricity, or chemical production. Numerous laboratory coal gasification trials have been performed in the academic and industrial fields. Lab-scale tests can provide insight into the processes involved with UCG. Many tests with UCG have been performed on ex situ reactors, where different UCG techniques, the effect of gasification agents, their flow rates, pressures, and various control m

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5

Kreinin, E. V., and A. Yu Zorya. "Underground coal gasification problems." Solid Fuel Chemistry 43, no. 4 (August 2009): 215–18. http://dx.doi.org/10.3103/s0361521909040053.

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6

Saik, Pavlo, Volodymyr Falshtynskyi, Vasyl Lozynskyi, Roman Dychkovskyi, Mykhailo Berdnyk, and Edgar Cabana. "Substantiating the operating parameters for an underground gas generator as a basic segment of the mining energy-chemical complex." IOP Conference Series: Earth and Environmental Science 1156, no. 1 (April 1, 2023): 012021. http://dx.doi.org/10.1088/1755-1315/1156/1/012021.

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Abstract This paper presents the main aspects of changing the coal mining technology based on the introduction of underground coal gasification technology for the mining-geological conditions of the occurrence of State Enterprise “Lvivvuhillia” coal seams on the example of “Chervonohradska” mine. When conducting analytical studies using the “Material-heat balance of underground coal gasification” software, predictive quantitative-qualitative indicators of the injected blast mixture and gasification products have been determined depending on the structure and elemental composition of the coal s

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7

Petrovic, David, Lazar Kricak, Milanka Negovanovic, Stefan Milanovic, Jovan Markovic, Nikola Simic, and Ljubisav Stamenic. "Valorization of non-balanced coal reserves in Serbia for underground coal gasification." Thermal Science 23, no. 6 Part B (2019): 4067–81. http://dx.doi.org/10.2298/tsci190725390p.

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Abstract (sommario):

In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for Serbia. The goal is to burn less coal, while simultaneously utilizing more gas from the onsite underground coal

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8

Durdán, Milan, Marta Benková, Marek Laciak, Ján Kačur, and Patrik Flegner. "Regression Models Utilization to the Underground Temperature Determination at Coal Energy Conversion." Energies 14, no. 17 (September 1, 2021): 5444. http://dx.doi.org/10.3390/en14175444.

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The underground coal gasification represents a technology capable of obtaining synthetic coal gas from hard-reached coal deposits and coal beds with tectonic faults. This technology is also less expensive than conventional coal mining. The cavity is formed in the coal seam by converting coal to synthetic gas during the underground coal gasification process. The cavity growth rate and the gasification queue’s moving velocity are affected by controllable variables, i.e., the operation pressure, the gasification agent, and the laboratory coal seam geometry. These variables can be continuously mea

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9

Saik, P., V. Lozynskyi, D. Malachkevych, and O. Cherniaіeva. "To the issue of underground gasification of low-thickness unconditioned coal reserves." Collection of Research Papers of the National Mining University 71 (December 2022): 91–103. http://dx.doi.org/10.33271/crpnmu/71.091.

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Purpose. Formation of an innovative approach in the rational development of low-thickness unconditioned coal reserves with the establishment of their suitability for underground gasification technology and the study of mass and heat indicators of the gasification process on the example of the mine of PJSC "DTEK Pavlohradvuhillia" named after Heroiv Kosmosu. Methods. The possibility of implementing the technology of in situ underground coal gasification was based on analytical studies. On the basis of the work developed by the professor of the Department of Mining Engineering and Education of "

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10

Zha, Xiao Xiong, Hai Yang Wang, and Shan Shan Cheng. "Finite Element Analysis of the Subsidence of Cap Rocks during Underground Coal Gasification Process." Advanced Materials Research 859 (December 2013): 91–94. http://dx.doi.org/10.4028/www.scientific.net/amr.859.91.

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This paper discusses the possible surface subsidence and deformation of the overlying rock during the underground coal gasification (UCG) process, which is an important part of feasibility studies for UCG operations. First coal seam roof movement and surface subsidence in the shallow UCG process were simulated by a finite element model coupled with heat transfer module in COMSOL. Numerical results from this model were compared with and in good agreement to the existing studies. This was followed by the development of model for deeper coal seam cases. The comparison of the numerical results fro

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11

Zhang, Zhizhen, Xiao Yang, Xiaoji Shang, and Huai Yang. "A Thermal-Hydrological-Mechanical-Chemical Coupled Mathematical Model for Underground Coal Gasification with Random Fractures." Mathematics 10, no. 16 (August 9, 2022): 2835. http://dx.doi.org/10.3390/math10162835.

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In this paper, in order to understand the development process and influencing factors of coal underground gasification, taking the two-dimensional underground gasification area of the plane as the simulation object, the characteristics of the multi-physical field coupling process of exudate mass heat transfer and combustion gasification reaction in the process of horizontal coal seam underground gasification are analyzed, and a two-dimensional mathematical model of thermal-hydrological-mechanical-chemical coupling of a porous medium is established. The temperature distribution of coal rock fro

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12

Pivnyak, Gennadiy, Volodymyr Falshtynskyi, Roman Dychkovskyi, Pavlo Saik, Vasyl Lozynskyi, Edgar Cabana, and Oleksandr Koshka. "Conditions of Suitability of Coal Seams for Underground Coal Gasification." Key Engineering Materials 844 (May 2020): 38–48. http://dx.doi.org/10.4028/www.scientific.net/kem.844.38.

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Results of evaluating the suitability of certain sections of Western Donbas coal seams, based predominately on properties of coal material, for their further experimental development by means of underground gasification method are represented. Criteria to evaluate both expediency of underground gasification and specific conditions of that process are substantiated basing upon the methodology developed at the National Mining University (Dnipro, Ukraine) together with representatives from National University of Saint Augustine (Arequipa, Peru). The methodology has been industrially approved with

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13

Falshtynskyi, V., P. Saik, R. Dychkovskyi, V. Lozynskyi, and M. Demydov. "Aspects for implementing the cumulative energy systems during underground coal gasification." Collection of Research Papers of the National Mining University 69 (June 2022): 94–104. http://dx.doi.org/10.33271/crpnmu/69.094.

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Purpose. An innovative approach formulation to the rational development of the potential of coal mines to expand the economic activity of mining enterprises based on the implementation of underground heat generators during coal gasification. Methods. Based on the conducted analytical and laboratory research, to study the possibility of introducing underground heat generators and cogeneration systems during gasification of coal at the site of its occurrence. The basis for conducting analytical studies is the experience of implementing the specified modules and cogeneration plants. The basis for

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14

Liu, Hong Tao, Hong Yao, Kai Yao, Feng Chen, and Guang Qian Luo. "Characteristics of "Three Zones" during Underground Coal Gasification." Advanced Materials Research 524-527 (May 2012): 56–62. http://dx.doi.org/10.4028/www.scientific.net/amr.524-527.56.

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According to the temperature, major chemical reactions and gas compositions, the gasification process along the tunnel of underground coal gasification is divided into three zones, i.e. oxidation zone, reduction zone and dry distillation zone. A model test in the laboratory was carried out by using large-scale coal blocks to simulate the coal seam. The characteristics of the “three zones”, and the relation between the temperature and gas composition were also quantitative studied. It provided the necessary basic knowledge for further studying the process of underground coal gasification, inclu

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15

Dubiński, Józef, and Marian Turek. "Basic Aspects Of Productivity Of Underground Coal Gasification Process." Archives of Mining Sciences 60, no. 2 (June 1, 2015): 443–53. http://dx.doi.org/10.1515/amsc-2015-0029.

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Abstract An analysis of conditions which enable attaining possibly highest productivity of industrial scale underground coal gasification technology is presented. The analysis was prepared basing on results obtained during an experimental gasification process conducted in workings of an active hard coal mine. Basic aspects determining application and productivity of the technology concern both general conditions, referring to the hard coal seam being gasified, and practical issues, which need to be considered in coal mine conditions. To present them, the technology of underground coal gasifica

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16

Konovsek, Damjan, Zdravko Praunseis, Jurij Avsec, Gorazd Bercic, Andrej Pohar, Simon Zavsek, and Milan Medved. "Underground coal gasification - the Velenje Coal Mine energy and economic calculations." Chemical Industry and Chemical Engineering Quarterly 23, no. 2 (2017): 269–77. http://dx.doi.org/10.2298/ciceq160504042k.

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Underground coal gasification (UCG) is a viable possibility for the exploitation of vast coal deposits that are unreachable by conventional mining and can meet the energy, economic and environmental demands of the 21st century. Due to the complexity of the process, and the site-specific coal and seam properties, it is important to acknowledge all the available data and past experiences, in order to conduct a successful UCG operation. Slovenia has huge unmined reserves of coal, and therefore offers the possibility of an alternative use of this domestic primary energy source. According to the av

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17

Saik, Pavlo, and Mykhailo Berdnyk. "Mathematical model and methods for solving heat-transfer problem during underground coal gasification." Mining of Mineral Deposits 16, no. 2 (June 30, 2022): 87–94. http://dx.doi.org/10.33271/mining16.02.087.

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Purpose. A mathematical model development for heat transfer during underground coal gasification based on the transcendental equation solution by the Newton-Raphson method. Methods. The heat-transfer model development is based on the research into a temperature field with a variable size of the gasification zone when passing through the phase transformation boundary, which changes abruptly. The research on the coal seam T(x, t) temperature field and the displacement length of the phase transition boundary S(t) is based on the integration of the differential heat-transfer equation with the fulf

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18

STEPHENS, D. R., R. W. HILL, and I. Y. BORG. "Status of Underground Coal Gasification." Mineral Processing and Extractive Metallurgy Review 1, no. 3-4 (April 1985): 265–96. http://dx.doi.org/10.1080/08827508508952595.

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19

Kapusta, Krzysztof, Marian Wiatowski, Krzysztof Stańczyk, Renato Zagorščak, and Hywel Rhys Thomas. "Large-scale Experimental Investigations to Evaluate the Feasibility of Producing Methane-Rich Gas (SNG) through Underground Coal Gasification Process. Effect of Coal Rank and Gasification Pressure." Energies 13, no. 6 (March 13, 2020): 1334. http://dx.doi.org/10.3390/en13061334.

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An experimental campaign on the methane-oriented underground coal gasification (UCG) process was carried out in a large-scale laboratory installation. Two different types of coal were used for the oxygen/steam blown experiments, i.e., “Six Feet” semi-anthracite (Wales) and “Wesoła” hard coal (Poland). Four multi-day gasification tests (96 h continuous processes) were conducted in artificially created coal seams under two distinct pressure regimes-20 and 40 bar. The experiments demonstrated that the methane yields are significantly dependent on both the properties of coal (coal rank) and the pr

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20

Lozynskyi, Vasyl, Volodymyr Falshtynskyi, Pavlo Saik, Roman Dychkovskyi, Bakhyt Zhautikov, and Edgar Cabana. "USE OF MAGNETIC FIELDS FOR INTENSIFICATION OF COAL GASIFICATION PROCESS." Rudarsko-geološko-naftni zbornik 37, no. 5 (2022): 61–74. http://dx.doi.org/10.17794/rgn.2022.5.6.

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Underground coal gasification is an alternative method for mining coal from thin and ultra-thin seams, which enables conversion of solid fossil fuels into combustible gases at the site of coal occurrence. At the same time, in the case when the coal seam thickness is critically small for the effective course of thermochemical reactions, it is necessary to intensify the gasification process. This paper studies one of the possible methods to intensify the process of underground coal gasification due to the influence of magnetic fields on the injected blast supplied into the gas generator gasifica

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21

Lozynskyi, Vasyl, Volodymyr Falshtynskyi, Arystan Kozhantov, Lina Kieush, and Pavlo Saik. "Increasing the underground coal gasification efficiency using preliminary electromagnetic coal mass heating." IOP Conference Series: Earth and Environmental Science 1348, no. 1 (May 1, 2024): 012045. http://dx.doi.org/10.1088/1755-1315/1348/1/012045.

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Abstract The purpose of this research is to explore the possibilities of using a high-frequency electromagnetic field for heating coal seams in the context of underground coal gasification. The research is based on mathematical models that take into account the physical parameters of the electromagnetic field. The methodology includes the calculation of thermal powers, exposure duration, temperature profiles and reaction rates. The research results indicate significant potential for using high-frequency electromagnetic field for coal seam pre-heating. Possibilities of using a high-frequency el

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22

Saik, Pavlo, Roman Dychkovskyi, Vasyl Lozynskyi, Volodymyr Falshtynskyi, Edgar Cabana, and Leonid Hrytsenko. "Studying the features of the implementation of underground coal gasification technology in terms of Lvivvuhillia SE." E3S Web of Conferences 168 (2020): 00036. http://dx.doi.org/10.1051/e3sconf/202016800036.

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Topical issues of the possibilities for changes in the coal extraction technology in terms of Stepova mine of Lvivvuhillia SE have been highlighted. Analysis of the current state of mining operations has been carried out. Design solutions as for introduction of the coal gasification technology in the life cycle of the mining enterprise has been proposed on the basis of the analytical, experimental, and industrial studies; the technology has been described. Percentage ratio of the output of combustion generator gases (Н2, СО, СН4) has been identified; gas combustion value and efficiency of the

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23

Saik, Pavlo, and Dmytro Yankin. "DEVELOPMENT OF METHODOLOGY FOR RESEARCH IN HYDROGEN-ORIENTED UNDERGROUND COAL GASIFICATION TECHNOLOGY." NAUKOVYI VISNYK DONETSKOHO NATSIONALNOHO TEKHNICHNOHO UNIVERSYTETU, no. 1(12) (2024): 129–38. http://dx.doi.org/10.31474/2415-7902-2024-1-12-129-138.

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Purpose. Establishing correlations between analytical and laboratory research in underground coal gasification with a focus on hydrogen production. Methodology. Analysis of experience in conducting analytical and laboratory research in the field of underground coal gasification in situ. Analysis of the application specifics of the Darcy-Weisbach equation to establish optimal conditions for supplying steam-air mixture to the combustion face considering the relationship between the volumetric flow of the specified mixture through the controlled pipeline and its cross-sectional area. Results. The

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24

Lozynskyi, Vasyl, Roman Dichkovskiy, Pavlo Saik, and Volodymyr Falshtynskyi. "Coal Seam Gasification in Faulting Zones (Heat and Mass Balance Study)." Solid State Phenomena 277 (June 2018): 66–79. http://dx.doi.org/10.4028/www.scientific.net/ssp.277.66.

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In this article, the mass and heat balance calculations of underground coal gasification process for thin coal seams in faulting zones of Lvivskyi coal basin (Ukraine) are defined. The purpose of the research is to establish regularities of heat and mass balance changes in faulting zones influence due to usage air and oxygen-enriched blast. A comprehensive methodology that included analytical calculations is implemented in the work. The output parameters of coal gasification products for the Lvivvyhillia coal mines are detailed. The heat balance is performed on the basis of the mass balance of

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Kačur, Ján, Marek Laciak, Milan Durdán, and Patrik Flegner. "Model-Free Control of UCG Based on Continual Optimization of Operating Variables: An Experimental Study." Energies 14, no. 14 (July 18, 2021): 4323. http://dx.doi.org/10.3390/en14144323.

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The underground coal gasification (UCG) represents an effective coal mining technology, where coal is transformed into syngas underground. Extracted syngas is cleaned and processed for energy production. Various gasification agents can be injected into an underground georeactor, e.g., air, technical oxygen, or water steam, to ensure necessary temperature and produce syngas with the highest possible calorific value. This paper presents an experimental study where dynamic optimization of operating variables maximizes syngas calorific value during gasification. Several experiments performed on an

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Durdán, Milan, Ján Terpák, Ján Kačur, Marek Laciak, and Patrik Flegner. "MODELING OF MATERIAL BALANCE FROM THE EXPERIMENTAL UCG." Acta Polytechnica 60, no. 5 (November 16, 2020): 391–99. http://dx.doi.org/10.14311/ap.2020.60.0391.

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The underground coal gasification is a continually evolving technology, which converts coal to calorific gas. There are many important parameters in this technology, which are difficult to measure. These parameters include the underground cavity growth, amount gasified coal, and the leakage of input and output gaseous components into the surrounding layers during the coal gasification process. Mathematical modeling of this process is one of the possible alternatives for determining these unknown parameters. In this paper, the structure of the mathematical model of laboratory underground coal g

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Saik, P., V. Lozynskyi, O. Anisimov, O. Akimov, A. Kozhantov, and O. Mamaykin. "Managing the process of underground coal gasification." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (December 23, 2023): 25–30. http://dx.doi.org/10.33271/nvngu/2023-6/025.

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Purpose. The research purpose is to determine the efficiency parameter of the coal gasification process based on the analysis of the composition of combustible gases (Н2, СН4, СО) and the producer gas calorific value, depending on the methods of supplying the blast mixtures to the gasifier oxidative zone. Methodology. A laboratory setup is used to perform experimental research into underground coal seam gasification. Its constituent segments are a stand, branches for supplying blast and gas-outlet mixtures, as well as a flow control system. This setup makes it possible to model the coal seam o

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Bielowicz, Barbara. "The suitability of polish ortho-lignite deposits for clean coal technologies." Gospodarka Surowcami Mineralnymi 32, no. 4 (December 1, 2016): 109–28. http://dx.doi.org/10.1515/gospo-2016-0034.

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Abstract The article presents the suitability of polish lignite deposits for clean coal technologies, mainly fluidized bed gasification and underground gasification. One of the key elements in this study, is a detailed diagnosis of the resource base, its analysis on the basis of the established verification criteria and -as a result - the achievement of a reliable assessment of suitability for highly efficient production of fuels and electric energy through lignite gasification in both surface and underground installations, taking into account both sozological conditions and protected geologic

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Škvareková, Erika, Marianna Tomašková, Gabriel Wittenberger, and Štefan Zelenák. "Analysis of Risk Factors for Underground Coal Gasification." Management Systems in Production Engineering 27, no. 4 (December 1, 2019): 227–35. http://dx.doi.org/10.1515/mspe-2019-0036.

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AbstractThe purpose of this article is to determine the environmental impacts of underground gasification on the population and to analyze the risk of underground coal gasification (UCG) activities using selected risk assessment methods. Coal gas is a regular part of coal deposits and its extraction also allows the use of coal deposits that cannot be extracted by traditional methods. These technologies bring both positive and negative aspects. The paper points out the risk analysis, hazard identification and assessment during the operation of UCG technology using a risk graph and a risk matrix

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Yin, Zhenyong, Hao Xu, Yanpen Chen, and Tiantian Zhao. "Coal char characteristics variation in the gasification process and its influencing factors." Energy Exploration & Exploitation 38, no. 5 (July 27, 2020): 1559–73. http://dx.doi.org/10.1177/0144598720935523.

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Underground coal gasification is a burgeoning coal exploitation technique that coal is directly converted into gaseous fuel by controlled combustion. In this paper, the gasification experiments of Inner Mongolia lignite, Xinjiang subbituminous coal, and Hancheng medium volatile bitumite were conducted respectively by using the tube furnace coal gasification experiment system. The gasification process was conducted under 3°C/min increment within the range of 600–900°C. The gas composition was analyzed by gas chromatography and the pore structure of the coal char was detected by low-temperature

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Laciak, Marek, Milan Durdán, Ján Kačur, and Patrik Flegner. "The Underground Coal Gasification Process in Laboratory Conditions: An Experimental Study." Energies 16, no. 7 (April 5, 2023): 3266. http://dx.doi.org/10.3390/en16073266.

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Abstract (sommario):

The underground coal gasification (UCG) process represents a modern and effective coal mining technology that enables coal energy extraction through thermic decomposition. The coal is transformed into syngas by oxidizers (e.g., air, technical oxygen, or water steam) and is injected into a georeactor. The produced syngas is exhausted on the surface, where it is transformed into the desired form of energy. This paper presents an experimental study of two experiments performed in ex-situ reactors. The paper describes the equipment for the UCG process, the physical models of the coal seam, and the

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Yuan, Shuxia, Wanwan Jiao, Chuangye Wang, Song Wu, and Qibin Jiang. "Simulation of Underground Coal-Gasification Process Using Aspen Plus." Energies 17, no. 7 (March 28, 2024): 1619. http://dx.doi.org/10.3390/en17071619.

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In order to study the underground coal-gasification process, Aspen Plus software was used to simulate the lignite underground gasification process, and a variety of unit operation modules were selected and combined with the kinetic equations of coal underground gasification. The model can reflect the complete gasification process of the coal underground gasifier well, and the simulation results are more in line with the experimental results of the lignite underground gasification model test. The changes in the temperature and pressure of oxygen, gasification water, spray water, and syngas in p

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Inkin, O. V., and N. I. Dereviahina. "Study of the migration processes in the roof of an underground gas-generator." Вісник Дніпропетровського університету. Геологія, географія 26, no. 1 (March 30, 2018): 64–70. http://dx.doi.org/10.15421/111807.

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Currently, coal is the main natural energy carrier in Ukraine due to its limited resources of oil and natural gas. A promising method for extracting coal is underground gasification using thermochemical and mass-exchange processes. This study was aimed at the investigation of migration processes in the roof rock of an underground gas-generator through developing a physicalmathematical model of migration of gasification products in the roof rocks of an underground gas-generator. We have substantiated the technological measures directed to eliminating the hydrocarbon zones, with additional extra

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Lozynskyi, Vasyl. "Critical review of methods for intensifying the gas generation process in the reaction channel during underground coal gasification (UCG)." Mining of Mineral Deposits 17, no. 3 (September 30, 2023): 67–85. http://dx.doi.org/10.33271/mining17.03.067.

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Purpose. The research purpose is to perform a critical analysis of methods for intensifying the gas generation process in the reaction channel to improve the efficiency and economic feasibility of coal seam gasification technology. The paper studies in detail the aspects of the chemical mechanism and technological parameters of this process in order to determine the possibilities for improving efficiency and productivity. Methods. The review study is based on an approach that includes an analysis of the underground coal gasification development, the study of chemical reactions in the reaction

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Mallett, CW. "Environmental controls for underground coal gasification." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 1 (August 2, 2017): 47–55. http://dx.doi.org/10.1177/0957650917723733.

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Effective environmental management of an underground coal gasification pilot has been demonstrated at Kogan in Queensland, Australia. It commenced with selection of a suitable site with a coal seam surrounded by impervious rocks that provided a gas seal for the gasifier and sufficient groundwater pressure to constrain lateral loss of gas and chemicals through coal fractures. Project infrastructure was specified to withstand the temperatures and pressures experienced during gasification and gas processing. During syngas production in the second gasifier, Panel 2, it was shown that all pyrolysis

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36

Proshunin, Yu E., and A. M. Poturilov. "Underground gasification of coal and lignite." Coke and Chemistry 59, no. 10 (October 2016): 370–79. http://dx.doi.org/10.3103/s1068364x16100082.

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37

Ahmed Qamar, Rizwan, Asim Mushtaq, Ahmed Ullah, and Zaeem Uddin Ali. "Designing of Underground Coal Gasification Unit." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 71, no. 2 (May 27, 2020): 103–33. http://dx.doi.org/10.37934/arfmts.71.2.103133.

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38

Walker, Leonard Keith. "Underground coal gasification: issues in commercialisation." Proceedings of the Institution of Civil Engineers - Energy 167, no. 4 (November 2014): 188–95. http://dx.doi.org/10.1680/ener.14.00003.

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39

Walker, L. K. "Commercial development of underground coal gasification." Proceedings of the Institution of Civil Engineers - Energy 160, no. 4 (November 2007): 175–80. http://dx.doi.org/10.1680/ener.2007.160.4.175.

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40

Cove, James, and Robert Oliver. "THIRTEENTH ANNUAL UNDERGROUND COAL GASIFICATION SYMPOSIUM." Petroleum Science and Technology 6, no. 1 (1988): 125–27. http://dx.doi.org/10.1080/08843758808915878.

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41

Jain, P. K. "Underground Coal Gasification – Experience of ONGC." IOP Conference Series: Earth and Environmental Science 76 (July 2017): 012004. http://dx.doi.org/10.1088/1755-1315/76/1/012004.

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42

Ghose, Mrinal K., and Biswajit Paul. "Underground coal gasification: a neglected option." International Journal of Environmental Studies 64, no. 6 (December 2007): 777–83. http://dx.doi.org/10.1080/00207230701775375.

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43

LIU, Shu-qin, Jing-gang LI, Mei MEI, and Dong-lin DONG. "Groundwater Pollution from Underground Coal Gasification." Journal of China University of Mining and Technology 17, no. 4 (December 2007): 467–72. http://dx.doi.org/10.1016/s1006-1266(07)60127-8.

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44

Khan, Md, Joseph Mmbaga, Ahad Shirazi, Japan Trivedi, Qingzia Liu, and Rajender Gupta. "Modelling Underground Coal Gasification—A Review." Energies 8, no. 11 (November 6, 2015): 12603–68. http://dx.doi.org/10.3390/en81112331.

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45

Mastalerz, Jerzy, Maciej S. Matyjaszczyk, and Jerzy Rauk. "Steam decomposition in underground coal gasification." Industrial & Engineering Chemistry Research 26, no. 2 (February 1987): 391–97. http://dx.doi.org/10.1021/ie00062a039.

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46

Imran, Muhammad, Dileep Kumar, Naresh Kumar, Abdul Qayyum, Ahmed Saeed, and Muhammad Shamim Bhatti. "Environmental concerns of underground coal gasification." Renewable and Sustainable Energy Reviews 31 (March 2014): 600–610. http://dx.doi.org/10.1016/j.rser.2013.12.024.

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47

Sadovenko, I. A., and A. V. Inkin. "Method for Stimulating Underground Coal Gasification." Journal of Mining Science 54, no. 3 (May 2018): 514–21. http://dx.doi.org/10.1134/s1062739118033941.

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48

Mellors, Robert, X. Yang, J. A. White, A. Ramirez, J. Wagoner, and D. W. Camp. "Advanced geophysical underground coal gasification monitoring." Mitigation and Adaptation Strategies for Global Change 21, no. 4 (July 1, 2014): 487–500. http://dx.doi.org/10.1007/s11027-014-9584-1.

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49

Liu, Hongtao, Feng Chen, Yuanyuan Wang, Gang Liu, Hong Yao, and Shuqin Liu. "Experimental Study of Reverse Underground Coal Gasification." Energies 11, no. 11 (October 29, 2018): 2949. http://dx.doi.org/10.3390/en11112949.

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Abstract (sommario):

Underground coal gasification (UCG) produces less pollution and is safer than traditional coal mining. In order to investigate the effects of different gasifying agents or comprehensive analyses of the characteristics of the gas components in the three zones for the reverse underground coal gasification process, a model test was carried out. The results showed that the oxygen concentration of a gasifying agent is recommended to be higher than 21%, which will lead to more combustible gases and a higher calorific value of gas. Higher flow rates and oxygen content generally afforded more desirabl

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50

Wiatowski, Marian, Krzysztof Kapusta, Aleksandra Strugała-Wilczek, Krzysztof Stańczyk, Alberto Castro-Muñiz, Fabián Suárez-García, and Juan Ignacio Paredes. "Large-Scale Experimental Simulations of In Situ Coal Gasification in Terms of Process Efficiency and Physicochemical Properties of Process By-Products." Energies 16, no. 11 (May 31, 2023): 4455. http://dx.doi.org/10.3390/en16114455.

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Abstract (sommario):

This paper presents a series of surface experiments simulating underground coal gasification (UCG). The main goal of the experiments was to investigate the influence of the gasification medium and the coal rank on the gasification process. Four multi-day trials were carried out using a laboratory gasification facility designed for the large-scale experimental simulations of UCG and located in the Experimental Mine “Barbara”, located at Mikołów, Poland. Two Polish bituminous coals were investigated: coal sourced from “Piast-Ziemowit” mine and coal sourced from “Wesoła” mine. Each of the two coa

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